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Table 4 Time between UKA and TKA for patients undergoing conversion

From: Unicompartmental knee arthroplasty: A PearlDiver study evaluating complications rates, opioid use and utilization in the Medicare population

  Number of UKA patients UKA patients who underwent conversion to TKA Average time between UKA and TKA for patients undergoing conversion
  # # % p RR 95% CI Days Δ 95% CI
Total 7,808 358 4.59% - - - 816.997 (SD 699.070) - -
Age at UKA
  < 70 3,180 193 6.07% - - - 857.802 (SD 757.430) - -
 70–79 3,694 150 4.06%  < 0.0001 0.6691 (0.5434, 0.8238) 782.020 (SD 641.146) 75.802 (44.144, 107.460)
  > 80 1,021 16 1.57%  < 0.0001 0.2582 (0.1558, 0.4278) 686.563 (SD 414.917) 171.239 (124.164, 218.314)
Gender
 Female 4,216 211 5.00% - - - 851.957 (SD 659.386) - -
 Male 3,592 147 4.09% 0.0547 0.8177 (0.6656, 1.0048) 766.816 (SD 751.853) 85.141 (53.5070, 119.7749)